The key question: How often in the previous two years did the child's health or any impairment stop them from taking part in those activities or from performing those activities normally?

What's a Limitation?

Children who had survived brain and bone cancer were particularly likely to report performance limitations, write the researchers.

The surveys don't show how severe those limitations were. Some kids may have needed help occasionally or with certain sorts of tasks but not others.

For instance, the study was "unable to account for the possibility that participants may have occasionally (rather than regularly) missed work or that they may have needed help with shopping but not with household chores," write the researchers.

They call for awareness about possible limitations for childhood cancer survivors -- even years after treatment -- and rehabilitation, when needed.